Density and viscosity sensor

Details Density and viscosity sensor Density and viscosity sensor

2011-06-14

2011-06-14

Williams, Hezron (Department: 2856)

Measuring and testing

Liquid analysis or analysis of the suspension of solids in a...

Viscosity

C073S03200R

Reexamination Certificate

active

07958772

ABSTRACT:
A density and viscosity sensor1for measuring density and viscosity of fluid F, the sensor1comprising a resonating element3, 3A,3B,3C,3D arranged to be immersed in the fluid F, an actuating/detecting element4A,4B coupled to the resonating element, and a connector7for coupling to the actuating/detecting element4A,4B. The sensor1further comprises a housing2defining a chamber8A isolated from the fluid F, the housing2comprising an area of reduced thickness defining a membrane9separating the chamber8A from the fluid F. The actuating/detecting element4A,4B is positioned within the chamber so as to be isolated from the fluid F and mechanically coupled to the membrane9. The resonating element3, 3A,3B,3C,3D arranged to be immersed in the fluid F is mechanically coupled to the membrane9. The membrane9has a thickness enabling transfer of mechanical vibration between the actuating/detecting element4A,4B and the resonating element3, 3A,3B,3C,3D.

REFERENCES:
patent: 4922745 (1990-05-01), Rudkin et al.
patent: 5323638 (1994-06-01), Langdon
patent: 0 282 251 (1988-09-01), None
patent: WO 02/077613 (2002-10-01), None
patent: WO 2004/086002 (2004-10-01), None

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